Ybele Klases, born circa 1721 (?).

Ybele was married to
Antje, born circa 1725 (?).

• 1 : Douwe Ybeles Kroes, born circa 1748, died in Workum on September 2, 1818, aged approximately 70 years.
  Douwe entered a notice of marriage in Workum on November 16, 1794. He was married there on November 16, 1794 in church, at the age of approximately 46 to Swaantje Jans (aged approximately 20 years), born in Zurich circa 1774, died in Workum on February 18, 1827, aged approximately 53 years.